2212222112021 has 4 divisors (see below), whose sum is σ = 2212225319052. Its totient is φ = 2212218904992.

The previous prime is 2212222111991. The next prime is 2212222112029. The reversal of 2212222112021 is 1202112222122.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 667098531121 + 1545123580900 = 816761^2 + 1243030^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2212222112021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2212222111984 and 2212222112002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2212222112029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97040 + ... + 2105673.

It is an arithmetic number, because the mean of its divisors is an integer number (553056329763).

Almost surely, 2^{2212222112021} is an apocalyptic number.

It is an amenable number.

2212222112021 is a deficient number, since it is larger than the sum of its proper divisors (3207031).

2212222112021 is a wasteful number, since it uses less digits than its factorization.

2212222112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3207030.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 2212222112021 its reverse (1202112222122), we get a palindrome (3414334334143).

The spelling of 2212222112021 in words is "two trillion, two hundred twelve billion, two hundred twenty-two million, one hundred twelve thousand, twenty-one".